论文部分内容阅读
以张家界太极溪特大桥为研究对象,分别采用线弹性稳定分析方法对大跨预应力混凝土连续刚构桥各施工阶段的稳定性和失稳模态进行计算,并使用非线性仿真分析方法单独对双肢薄壁墩进行计入初始几何缺陷的几何非线性分析,得到线性屈曲分析与几何非线性分析的结果比较。通过比较可知,考虑几何非线性的稳定分析对于指导工程实践具有更好的实践意义。
Taking Zhangjiajie Taixi Bridge as the research object, the stability and the destabilization mode of each span of prestressed concrete continuous rigid-frame bridge with large span are calculated by using the linear elastic stability analysis method separately. The nonlinear simulation analysis method is used separately The two-limb thin-walled piers are geometrically nonlinear calculated into initial geometric imperfections, and the results of linear buckling analysis and geometric nonlinear analysis are compared. It can be seen from the comparison that the stability analysis considering geometrical nonlinearity has better practical significance for guiding engineering practice.